LISTVIEW CONTROL

I am familiar with the Listbox and have used it successfully many times. Now, I am attempting to use the LISTVIEW control in a dialog box. I have successfully loaded data into the control, but now I want the application to call a subroutine when an a row is clicked in the LISTVIEW control. I have used the "dlgsetsub" funtion to define which callback subroutine to call, but nothing happens when a row in the LISTVIEW control is clicked. Should this work or should I be doing something different. Any help that you can provide would be greatly appreciated.